/*
 * To change this template, choose Tools | Templates
 * and open the template in the editor.
 */
package com.servlet;

import com.kamus.Constants;
import com.kamus.manager.UserManager;
import com.kamus.model.User;
import java.io.IOException;
import javax.servlet.RequestDispatcher;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;

/**
 *
 * @author omega
 */
public class login extends HttpServlet {

    /** 
     * Processes requests for both HTTP <code>GET</code> and <code>POST</code> methods.
     * @param request servlet request
     * @param response servlet response
     * @throws ServletException if a servlet-specific error occurs
     * @throws IOException if an I/O error occurs
     */
    protected void processRequest(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
        RequestDispatcher rd = null;
        String username=null, password=null;
        try {
            username = request.getParameter("username");
            password = request.getParameter("password");
            if (username.isEmpty() || password.isEmpty()) {
                rd = request.getRequestDispatcher("login.jsp");
                rd.forward(request, response);
                request.getSession().setAttribute("handling.error", Constants.ERROR_LOGIN);
                return;
            }
        } catch (NullPointerException e) {
        }

        UserManager userManager = new UserManager();
        if (userManager.cekUser(new User(username, password))) {
            //jika sukses
            HttpSession session = request.getSession(true);
            session.setAttribute("user", username);
            rd = request.getRequestDispatcher("main.jsp");
            rd.forward(request, response);
        } else {
            //jika gagal
            rd = request.getRequestDispatcher("login.jsp");
            rd.forward(request, response);
            request.getSession().setAttribute("handling.error", Constants.ERROR_LOGIN);
        }
    }

    // <editor-fold defaultstate="collapsed" desc="HttpServlet methods. Click on the + sign on the left to edit the code.">
    /** 
     * Handles the HTTP <code>GET</code> method.
     * @param request servlet request
     * @param response servlet response
     * @throws ServletException if a servlet-specific error occurs
     * @throws IOException if an I/O error occurs
     */
    @Override
    protected void doGet(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
        processRequest(request, response);
    }

    /** 
     * Handles the HTTP <code>POST</code> method.
     * @param request servlet request
     * @param response servlet response
     * @throws ServletException if a servlet-specific error occurs
     * @throws IOException if an I/O error occurs
     */
    @Override
    protected void doPost(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
        processRequest(request, response);
    }

    /** 
     * Returns a short description of the servlet.
     * @return a String containing servlet description
     */
    @Override
    public String getServletInfo() {
        return "Short description";
    }// </editor-fold>
}
